[uhn-kuh n-fawr-muh-buh l]
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Origin of unconformable

First recorded in 1585–95; un-1 + conformable
Related formsun·con·form·a·bil·i·ty, nounun·con·form·a·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of unconformable

British Dictionary definitions for unconformable


  1. not conformable or conforming
  2. (of rock strata) consisting of a series of younger strata that do not succeed the underlying older rocks in age or in parallel position, as a result of a long period of erosion or nondeposition
Derived Formsunconformability or unconformableness, noununconformably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012